diff options
Diffstat (limited to 'vcl/skia')
| -rw-r--r-- | vcl/skia/gdiimpl.cxx | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/vcl/skia/gdiimpl.cxx b/vcl/skia/gdiimpl.cxx index 9304246e439e..b00b74d24647 100644 --- a/vcl/skia/gdiimpl.cxx +++ b/vcl/skia/gdiimpl.cxx @@ -1329,11 +1329,23 @@ bool SkiaSalGraphicsImpl::drawAlphaBitmap(const SalTwoRect& rPosAry, const SalBi assert(dynamic_cast<const SkiaSalBitmap*>(&rAlphaBitmap)); // In raster mode use mergeCacheBitmaps(), which will cache the result, avoiding repeated // alpha blending or scaling. In GPU mode it is simpler to just use SkShader. - sk_sp<SkImage> image = mergeCacheBitmaps(static_cast<const SkiaSalBitmap&>(rSourceBitmap), - static_cast<const SkiaSalBitmap*>(&rAlphaBitmap), - rSourceBitmap.GetSize()); + SalTwoRect imagePosAry(rPosAry); + Size imageSize = rSourceBitmap.GetSize(); + // If the bitmap will be scaled, prefer to do it in mergeCacheBitmaps(), if possible. + if ((rPosAry.mnSrcWidth != rPosAry.mnDestWidth || rPosAry.mnSrcHeight != rPosAry.mnDestHeight) + && rPosAry.mnSrcX == 0 && rPosAry.mnSrcY == 0 + && rPosAry.mnSrcWidth == rSourceBitmap.GetSize().Width() + && rPosAry.mnSrcHeight == rSourceBitmap.GetSize().Height()) + { + imagePosAry.mnSrcWidth = imagePosAry.mnDestWidth; + imagePosAry.mnSrcHeight = imagePosAry.mnDestHeight; + imageSize = Size(imagePosAry.mnSrcWidth, imagePosAry.mnSrcHeight); + } + sk_sp<SkImage> image + = mergeCacheBitmaps(static_cast<const SkiaSalBitmap&>(rSourceBitmap), + static_cast<const SkiaSalBitmap*>(&rAlphaBitmap), imageSize); if (image) - drawImage(rPosAry, image); + drawImage(imagePosAry, image); else drawShader( rPosAry, |